The lid openning and closing of this type machine is operated by electromotor or cylinder, (It could be selected by customers according to their requirement). This type machine is solved the problem of lid distortion, gas leaking and hard operation, which because of oversize and heavy weight of machine lid. The start button and emergency is special designed for machine which makes insure the safty of operator and reduce the working intensity dramatically. Up-down floatable gemel ensured the stability of lid opening and closing, and prolong the working life. The working efficiency of vacuum packaging is depend on the exhaust port of vacuum pump, the vacuum pump capacity which listed in format is standard one, if customers require to big one, it could be configured based on enough inner space of machine.